X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail11.syd.optusnet.com.au ([211.29.132.192] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTPS id 718919 for flyrotary@lancaironline.net; Mon, 12 Sep 2005 02:39:20 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.192; envelope-from=lendich@optusnet.com.au Received: from george (d58-104-138-74.dsl.nsw.optusnet.com.au [58.104.138.74]) by mail11.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j8C6cTJX018115 for ; Mon, 12 Sep 2005 16:38:31 +1000 Message-ID: <002401c5b764$e23d54d0$4a8a683a@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Optimal GPM water pump flow. Date: Mon, 12 Sep 2005 16:40:36 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0021_01C5B7B8.B3785380" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0021_01C5B7B8.B3785380 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dave, I don't know for sure myself but the so called experts on another site = recommend that 2 cooler should run in parallel - FWIW. George ( down under) Al. What I am after is trying to determine what the minimum required = flow is for the horsepower generated. More than anything else, I do not = want to be BELOW that amount, and consider it a minimum. Understandably, = trying to place twice or nearly 3 times the flow through the same = circuit will result in higher pressures and perhaps some pump = cavitation. I will deal with that as I have to.. more than anything else = I want to make sure I am not starting off with a DEFICIT of water flow = ability. =20 I am considering 2 smaller radiators, and originally I intended to = plumb them in series to get the best cumulative Delta-T across them, but = if I have "pressure" problems due to the pump's flow, I may go to a = parralel arrangement.=20 =20 Feel free to critique, Al.. My cooling system is a work in progress = that is evolving. I live in a place that has 100 degree temps with 90% = humidity at times, and given the other folks demonstrated problems with = inadequate cooling, I am very much in favor of designing in excess = cooling capacity, to the point I may even incur a slight weight or drag = penalty, such that I don't have to give constant attention to the risk = of overheating. =20 Dave Al Gietzen wrote: Subject: [FlyRotary] Re: Optimal GPM water pump flow. www.racemate.com They were unable to find the photo of the Mazda = install but they say the did a few. I am going to take the plunge and = get one..=20 Dave Just curious what you're after with the racemate. You were asking = about "optimal" flow - double the needed flow is not optimum; high = pressure gradients around the loop, unnecessary pumping power. Al-- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ =20 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_0021_01C5B7B8.B3785380 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Dave,

I don't know for sure myself but the so = called=20 experts on another site recommend that 2 cooler should run in parallel - = FWIW.

George ( down under)

Al.
=20 What I am after is trying to determine what the minimum required flow = is for=20 the horsepower generated. More than anything else, I do not want = to be=20 BELOW that amount, and consider it a minimum. Understandably, trying = to place=20 twice or nearly 3 times the flow through the same circuit will result = in=20 higher pressures and perhaps some pump cavitation. I will deal with = that as I=20 have to.. more than anything else I want to make sure I am not = starting off=20 with a DEFICIT of water flow ability.

I am considering 2 = smaller=20 radiators, and originally I intended to plumb them in series to get = the best=20 cumulative Delta-T across them, but if I have "pressure" problems due = to the=20 pump's flow, I may go to a parralel arrangement.

Feel = free to=20 critique, Al.. My cooling system is a work in progress that is = evolving. I=20 live in a place that has 100 degree temps with 90% humidity at times, = and=20 given the other folks demonstrated problems with inadequate cooling, I = am very=20 much in favor of designing in excess cooling capacity, to the point I = may even=20 incur a slight weight or drag penalty, such that I don't have to give = constant=20 attention to the risk of overheating.

Dave

Al = Gietzen=20 wrote:
Subject: = [FlyRotary]=20 Re: Optimal GPM water pump flow.

www.racemate.com They = were unable to find the photo of the Mazda install but they say the did = a few. I am going to take the plunge and get one..=20 Dave

Just curious what you=92re after with the = racemate. You were asking about =93optimal=94 flow =96 double the = needed flow is not optimum; high pressure gradients around the loop, = unnecessary pumping power.

Al
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